How Do Monarch Butterflies Navigate Their Epic Migration?

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Discussion Overview

The discussion centers around the migration of monarch butterflies, exploring the mechanisms and mysteries behind their navigation from North America to specific overwintering sites in Mexico. Participants reflect on the unique aspects of this migration compared to other species, such as birds, and share their thoughts on a NOVA program that documents this phenomenon.

Discussion Character

  • Exploratory
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants highlight the remarkable nature of monarch migration, noting that unlike birds, the entire population migrates without prior experience or guidance from others.
  • It is mentioned that the butterflies travel to a specific area in Michoacán, Mexico, where they roost and enter a state resembling hibernation.
  • Participants express appreciation for the NOVA program, citing its beautiful cinematography and effective portrayal of the migration phenomenon.
  • There is a shared frustration regarding the accessibility of the NOVA videos, with some noting that newer episodes are only available in the United States.

Areas of Agreement / Disagreement

Participants generally agree on the uniqueness and mystery of monarch migration, but there is no consensus on the specific mechanisms behind their navigation. The discussion includes both appreciation for the documentary and frustration over its accessibility.

Contextual Notes

Some participants discuss the differences between learned migration in birds and the instinctual migration of monarch butterflies, but the underlying mechanisms of navigation remain unresolved.

Who May Find This Useful

Readers interested in entomology, migration patterns, and documentary filmmaking may find this discussion engaging.

Ivan Seeking
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Orange-and-black wings fill the sky as NOVA charts one of nature's most remarkable phenomena: the epic migration of monarch butterflies across North America. NOVA's filmmakers followed monarchs on the wing throughout their extraordinary odyssey.

...Shedding light on this natural wonder are some of the world's leading monarch researchers, including Lincoln Brower of Sweet Briar College, independent biologist Bill Calvert, and Orley "Chip" Taylor of the University of Kansas.

Putting the monarch phenomenon into perspective, Taylor says, "You've got a butterfly that's originating in Toronto, or it's originating in Detroit, Michigan, or it's coming down from St. Paul or maybe even Winnipeg, and it's moving south. Somehow it finds its way to Mexico. Could you do that?"

No one yet knows how the butterflies do it, but Taylor's research reveals that they are expert navigators[continued]
http://www.pbs.org/wgbh/nova/butterflies/about.html

Watch the Program

This one-hour program is divided into six chapters. Choose any chapter below and select QuickTime or Windows Media Player to begin viewing the video. If you experience difficulty viewing, it may be due to high demand. We regret this and suggest you try back at another time.
http://www.pbs.org/wgbh/nova/butterflies/program.html
 
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Sigh...we used to be able to view NOVA (and we still can view those old ones), but the newer videos can only be viewed within the United States now :(
 
Putting the monarch phenomenon into perspective, Taylor says, "You've got a butterfly that's originating in Toronto, or it's originating in Detroit, Michigan, or it's coming down from St. Paul or maybe even Winnipeg, and it's moving south. Somehow it finds its way to Mexico. Could you do that?"

The monarch migration is truly a remarkable mystery. It's unlike bird migrations where the year's newborns are guided to the over-wintering areas by those that know the way. So with birds, it is a learned thing. With the monarch butterflies, it is a first time trip for the entire migrating population. And not only do they cross the border into Mexico, but they travel to a a very specific area (not a large area either) in the mountains in Michocan where they roost in the forest and go into a type of hibernation. Their migration is quite an amazing thing.
 
yenchin said:
Sigh...we used to be able to view NOVA (and we still can view those old ones), but the newer videos can only be viewed within the United States now :(

Bummer! Maybe you will be able to view the newer ones when they're older ones. :biggrin:
 
runner said:
The monarch migration is truly a remarkable mystery. It's unlike bird migrations where the year's newborns are guided to the over-wintering areas by those that know the way. So with birds, it is a learned thing. With the monarch butterflies, it is a first time trip for the entire migrating population. And not only do they cross the border into Mexico, but they travel to a a very specific area (not a large area either) in the mountains in Michocan where they roost in the forest and go into a type of hibernation. Their migration is quite an amazing thing.

Yes! That and a number of other aspects of this phenomenon are quite fascinating. Also, Nova did a great job. There is some beautiful cinematography in this one.
 
Hey thanks Ivan I missed part of the program.:smile: